Improvement in double-acting pumps



Unable Acting Pumps.

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Patented Sept 1 ,1874.

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. UNITED STATES PATENT OFrIoE;

JAMES nonieerson, or new YORK, N. Y..

IMPROVEMENT m DOUBLEJACTING PUMPS.

Specification forming part of Letters Patent N 0. [54,566, dated September 1', 1874; application filed July 3, 1874.,

at all whom it may concern Be it known'that 1, James Rosnerson, of the city, county, and State of New York, have v invented a new and-useful Improvementin Double-Acting Pump, of which the following is a specification: I i s Figure 1 is' a front .view of my improved pump, partly section, through the line a: m, Fig. '2. Fig, Zis a horizontal section of the saine, taken through the line y y, Fig. 1. Fig.

3 is a detail 'ifertical'section of one of the' valves.- Fig. l is an enlarged detail section, taken through the "line a av, Fig. 2, showing a modified form f the valve. Fig. 5 is a'detail cross-section of the same, taken through the line .v e, Fig.6. Fig, 6 represents a key for removing the valves. I

Similar letters of reference indicate corresponding parts.

The invention relates to a double-acting pump designed especially for use on shipboard, but applicable elsewhere, or for gen? eral purposes.

The invention relates to the combination of parts, having for its general or chief object. convenient access to the interior-of the pumpupper end of the lower valve-chamberB is closed by a valve, J, from which a passage, *K, leads to the head L of-the pump. .The upper end of the upper valve-chamber. E is 3 closed bya plate, M, which is held down to its seat by a screw,N, which passes-through-a. screw-hole in the bar 0, the ends of which are placed beneath lugs P cast uponthe head L, Q is the piston, the, rod R of which passes up through the plate S, which rests upon the upper end of the piston-chamber H, and serves as a discharge-valve to said chamber. .The piston-rod It works in guide T, and has an eccentric connection, Y W, with the crankshaft X Z, which carries a balance-wheel, A. The movements of the water caused by the downward movements, of the piston ,are indicatcd by arrowsvmarke'd 1. As the piston Q moves upward, a vacuum is formed inthechamber B, which causes the water to pass up through the passage A, raise the valve 0, pass into the chamber B, and thence through the passage G into the lower part of 'the piston-chamber H, to be forcedout by. he next. downward movement of the piston. The same upward movement of the piston forces the water in thenpper part of the piston-chamber to raisethe plate or valve S, pass into thehead L, and flow out through the spout B.

The movementsof'the'water caused by the upward movement of the piston Q are indicated by arrows 2. v

The valves F J may-all be drop-valves, as shown In Flgs. l, 4; .or,if desired, the

valve F may be a clack-valve, as shown in Figs, 5, 6, which offers less obstruction to pieces of wood or other rubbish which may enter the pump with the water.

the lower end of which rests in a socket for-med to receive it in the, valve-scat, and

which is held in place by the plate M, which rests upon ts upper end, as shown in Fig. 5.

-By this arrangement the valve F can be taken out to remove any rubbish that may be m the passage D without stopping the pump,

which will then act as asingleacting pump. This arrangement also enables the dischargevalve J andthe lower suction-valve C to be readily taken out to remove any rubbish that may be in the passages B A. The passages VKBA being in a vertical line, enables a tool to be inserted into; the pipe forthe removal vof any rubbish there maybe in said. pipe. v To enable the valves to be easily raised, I adopt a construction found in certain airpumps.-to wit: The screw of each valve is perforated from its forward or upper end nearly to its shoulder, and a cross perforation ls-found leading out through the side of the screw.

Thus, when the'valve is to be taken out, one or two turns of the screw will uncover p In this case the valve should be hinged to a shortrod' fihe-pepfqg at ionffis shqwjLim'Fig: i aiikyals c rew' N,pro"sseba r 0,-an6; lugs P; witb fh hp- Slow-M25130 passdn beneath the valve and de -=per valv-chamber E'and-'-the head L'of the Stray the vacuum which forms beneath it at pump, substantially as herein shown and. de-

such times. scribed.

Havingthus described myinventionflelaim JAMES ROBERTSON. as new and..(lsire to securQ- -by;Lett-ersfat Wimessesa v: entr- 'f 'JAMESEGRAHAM,

The, cnmbiuation of the-plate M, lock ing- T. B. Mo sm m 

